Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5253625 | Internal combustion engine having a hypereutectic aluminum-silicon block and aluminum-copper pistons | Raymond J. Donahue, Terrance M. Cleary | 1993-10-19 |
| 5129378 | Two-cycle marine engine having aluminum-silicon alloy block and iron plated pistons | Raymond J. Donahue, Richard A. Lanpheer, W. Donald Schultz | 1992-07-14 |
| 5111869 | Evaporable foam pattern for casting a cylinder block of a two-cycle engine | William D. Corbett | 1992-05-12 |
| 5035276 | Evaporable foam pattern assembly for casting a housing for a rotary engine | William D. Corbett | 1991-07-30 |
| 4915603 | Rotary engine cooling system | William D. Corbett | 1990-04-10 |
| 4911122 | Tuned intake air inlet for a rotary engine | William D. Corbett | 1990-03-27 |
| 4911623 | Method and apparatus for lubricating a rotary engine | William D. Corbett | 1990-03-27 |
| 4844025 | Dual spark plug combustion chamber | — | 1989-07-04 |
| 4821694 | Hypereutectic aluminum-silicon casting alloy | William G. Hesterberg, Raymond J. Donahue | 1989-04-18 |
| 4603665 | Hypereutectic aluminum-silicon casting alloy | William G. Hesterberg, Raymond J. Donahue | 1986-08-05 |
| 4481910 | Stratified-charge two-stroke cycle engine | — | 1984-11-13 |
| 4481911 | Stratified-charge cross-flow scavenged two-stroke cycle engine | John M. Griffiths | 1984-11-13 |
| 4475499 | Inlet tuning of crankcase supercharged four cycle engine | — | 1984-10-09 |
| 4461251 | Crankcase supercharged four cycle engine with jet pump assist | — | 1984-07-24 |